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package org.graalvm.nativeimage.impl.clinit;

import org.graalvm.nativeimage.ImageSingletons;
import org.graalvm.nativeimage.impl.ImageSingletonsSupport;
import org.graalvm.nativeimage.impl.RuntimeClassInitializationSupport;

public class ClassInitializationTracking {

    
Field that is true during native image generation (even during system class loading), but
false at run time.
Static initializer runs on the hosting VM, setting field value to true during native image
generation. At run time, the substituted value is used, setting the field value to false.
/**
     * Field that is true during native image generation (even during system class loading), but
     * false at run time.
     *
     * Static initializer runs on the hosting VM, setting field value to true during native image
     * generation. At run time, the substituted value is used, setting the field value to false.
     */
    public static final boolean IS_IMAGE_BUILD_TIME;

    static {
        /*
         * Prevents javac from constant folding use of this field. It is set to true by the process
         * that builds the shared library.
         */
        IS_IMAGE_BUILD_TIME = true;
    }

    
This method is called from the instrumented class initialization methods.
/**
     * This method is called from the instrumented class initialization methods.
     */
    @SuppressWarnings({"unused", "ConstantConditions"})
    public static void reportClassInitialized(Class<?> c, StackTraceElement[] stackTrace) {
        if (ImageSingletonsSupport.isInstalled() && ImageSingletons.contains(RuntimeClassInitializationSupport.class)) {
            RuntimeClassInitializationSupport runtimeClassInitialization = ImageSingletons.lookup(RuntimeClassInitializationSupport.class);
            runtimeClassInitialization.reportClassInitialized(c, stackTrace);
        }
    }

    
This method is called from the instrumented class initialization methods.
/**
     * This method is called from the instrumented class initialization methods.
     */
    @SuppressWarnings({"unused"})
    public static void reportObjectInstantiated(Object o, StackTraceElement[] stackTrace) {
        if (ImageSingletonsSupport.isInstalled() && ImageSingletons.contains(RuntimeClassInitializationSupport.class)) {
            RuntimeClassInitializationSupport runtimeClassInitialization = ImageSingletons.lookup(RuntimeClassInitializationSupport.class);
            runtimeClassInitialization.reportObjectInstantiated(o, stackTrace);
        }
    }

}